BBC1 trails and continuity announcements from the original 1983 transmission and the subsequent transmission of the story in four parts. The full opening title and closing credits of the four-part version are included for completeness. Duration: 19'08"

Special Commentary by David Tennant (the Doctor), Phil Colinson (New Series Producer), and Helen Raynor (New Series Writer). Go to the 'Audio Options' menu. Click on the hidden Doctor Who logo to the right of 'Companions Commentary'.

Veteran television director Peter Moffatt looks back with affection on his work on Doctor Who. Producer: John Finklestone. Producer: Peter Finklestone. Available on The Visitation. (26'00" | TBC | 2004)